UPDATE SATURDAY 12.45PM: POLICE have charged three males after they allegedly robbed two teenage girls at knife point earlier this week.

Police will allege at around 7.53pm on January 26, two males entered the Foodworks supermarket on the corner of Dean and Kerrigan St, Rockhampton, produced a knife and demanded money from the till.

It will be further alleged two more males then entered the store before all four made off with a sum of cash.

Two girls, aged 16 and 17, were working as cashiers when the robbery took place.

A 21-year-old Gladstone man has been charged with one count each of unlawful use of a motor vehicle and armed robbery in company - he is due to appear in Rockhampton Magistrates Court on January 30.

A 13-year-old boy has been charged with two counts of unlawful use of a motor vehicle and one count each of robbery, stealing and enter premises with intent to commit indictable offences.

A 15-year-old boy has been charged with one count each of unlawful use of a motor vehicle and robbery.

The 13 and 15-year-old boys will be dealt with under the Youth Justice Act.

FRIDAY: CCTV footage has captured the horrifying moment two teenage girls were robbed at knife point by a gang of juveniles.

The girls, aged 16 and 17, were working as cashiers at the Foodworks supermarket on Dean St, Rockhampton, when four "indigenous" males - two armed with knives - entered the store and demanded money from the cash drawer.

Three offenders are estimated to be 12 to 13 years old, while the fourth is believed to be around 17 years old.

In a statement to the media, Detective Senior Sergeant Luke Peachey gave details of the crime and expressed concern over the age of the offenders.

"At approximately 7.53pm last night four unknown juveniles have attended the Foodworks store on Dean St, in Frenchville," Snr Sgt Peachey said.

"At that time two of those persons were armed with knives, they've then demanded the cashiers there to open the till.

"...all four of those persons have helped themselves to an amount of cash and those persons have then decamped from the premises.

"It's absolutely disguising and we hope the community of Rockhampton is just as disgusted as us.

"The fact that 12 and 13 year old persons are out this time of night and committing these offences is very concerning."

Snr Sgt Peachey praised the two victims for their response to the incident which saw over $600 stolen from the business.

"Those poor girls were doing their job," Snr Sgt Peachey said.

"They did the right thing, they complied with the directions - but once again that propensity for that violence to get out of control and the fact that they've bought knives is very concerning."

Members of the public are urged to come forward with any information that could lead police to the identity of the offenders.

"Currently police are investigating, obviously the persons involved and what we're asking for is any public assistance from anyone in regards to any information they have," Snr Sgt Peachey said.

"It may the smallest thing that you overheard something or see that these four persons are getting around around splashing a bit of cash please contact either Rockhampton police or Crime Stoppers.

The shop's owner today declined to comment.

If you have information that could assist police contact Crime Stoppers on 1800 333 000 or the Rockhampton police station on 4932 3500.